Air carrier large transport uses taxiway that was closed to type of aircraft.

Attributes
ACN	183044
Time
Date	199107
Day	Fri
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pdx
State Reference	OR
Altitude	agl bound lower : 0 agl bound upper : 0
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zny
Operator	common carrier : air carrier
Make Model Name	Large Transport, Low Wing, 2 Turbojet Eng
Navigation In Use	Other Other
Flight Phase	ground other : taxi
Flight Plan	IFR
Person 1
Affiliation	company : air carrier
Function	flight crew : captain oversight : pic
Qualification	pilot : atp
Experience	flight time last 90 days : 80 flight time total : 18000 flight time type : 1400
ASRS Report	183044
Person 2
Affiliation	company : air carrier
Function	flight crew : first officer
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 210 flight time total : 6000 flight time type : 830
ASRS Report	183283
Events
Anomaly	non adherence : far non adherence : clearance non adherence : published procedure
Independent Detector	other controllera
Resolutory Action	none taken : detected after the fact
Consequence	faa : reviewed incident with flight crew
Supplementary
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

After pushing back from gate (reference: airport diagram, chart 10-9 of pdx) we were cleared to taxi to runway 28L. I proceeded to taxi around the terminal on the ramp toward S-5; seeing taxiway tango completely empty of any aircraft, parked or otherwise, I proceeded to use taxiway tango to reach taxiway B. After getting on to B, ground control advised us that tango was closed to aircraft with a wing span greater than 108 ft. Apparently I misread the chart believing that restriction was only an advisory when aircraft were parked on that part of the ramp. I have two suggestions concerning this incident. First, a small sign should be in view at the approachs to tango to remind pilots of the restrictions (if one is there I did not see it). Second, if the restriction made reference to a type of aircraft (ie, tango closed to aircraft or larger) pilots could relate to it better. Supplemental information from acn 183283. I did not notice that this was also highlighted on the airport diagram. As we proceeded around the terminal the captain taxied onto taxiway tango. At this time I was unaware that we were on taxiway tango.

Original NASA ASRS Text

Title: ACR LGT USES TAXIWAY THAT WAS CLOSED TO TYPE OF ACFT.

Narrative: AFTER PUSHING BACK FROM GATE (REF: ARPT DIAGRAM, CHART 10-9 OF PDX) WE WERE CLRED TO TAXI TO RWY 28L. I PROCEEDED TO TAXI AROUND THE TERMINAL ON THE RAMP TOWARD S-5; SEEING TAXIWAY TANGO COMPLETELY EMPTY OF ANY ACFT, PARKED OR OTHERWISE, I PROCEEDED TO USE TAXIWAY TANGO TO REACH TAXIWAY B. AFTER GETTING ON TO B, GND CTL ADVISED US THAT TANGO WAS CLOSED TO ACFT WITH A WING SPAN GREATER THAN 108 FT. APPARENTLY I MISREAD THE CHART BELIEVING THAT RESTRICTION WAS ONLY AN ADVISORY WHEN ACFT WERE PARKED ON THAT PART OF THE RAMP. I HAVE TWO SUGGESTIONS CONCERNING THIS INCIDENT. FIRST, A SMALL SIGN SHOULD BE IN VIEW AT THE APCHS TO TANGO TO REMIND PLTS OF THE RESTRICTIONS (IF ONE IS THERE I DID NOT SEE IT). SECOND, IF THE RESTRICTION MADE REFERENCE TO A TYPE OF ACFT (IE, TANGO CLOSED TO ACFT OR LARGER) PLTS COULD RELATE TO IT BETTER. SUPPLEMENTAL INFO FROM ACN 183283. I DID NOT NOTICE THAT THIS WAS ALSO HIGHLIGHTED ON THE ARPT DIAGRAM. AS WE PROCEEDED AROUND THE TERMINAL THE CAPT TAXIED ONTO TAXIWAY TANGO. AT THIS TIME I WAS UNAWARE THAT WE WERE ON TAXIWAY TANGO.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.